EP2156008B1 - Dichtungsvorrichtung und verfahren zur abdichtung einer verrohrung - Google Patents

Dichtungsvorrichtung und verfahren zur abdichtung einer verrohrung Download PDF

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Publication number
EP2156008B1
EP2156008B1 EP07747301A EP07747301A EP2156008B1 EP 2156008 B1 EP2156008 B1 EP 2156008B1 EP 07747301 A EP07747301 A EP 07747301A EP 07747301 A EP07747301 A EP 07747301A EP 2156008 B1 EP2156008 B1 EP 2156008B1
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EP
European Patent Office
Prior art keywords
sealing
sealing device
casing
core
segments
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP07747301A
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English (en)
French (fr)
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EP2156008A1 (de
Inventor
Jan Noord
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Individual
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Individual
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing

Definitions

  • the present invention relates to a sealing device and method for sealing a casing.
  • casings are for instance used in a wellbore for optionally sealing the casing to e.g. to circulate fluid through the casing.
  • US 5,632,952 discloses an extendable casing circulator and method for sealing that may be utilised in either a conventional drilling rig, or in a top drive rig.
  • the sealing device is brought into the casing using an extension device after which a packer element is inflated. This inflated packer element is deflated before withdrawal of the sealing device.
  • the sealing device comprises a top cap that is put over the casing.
  • Document US 4, 457, 369 discloses a sealing device for sealing a casing comprising sealing segments and wedges as in the preamble of claim 1.
  • Document US 2004/000405 and US 5,735,348 disclose a valve and the filling and circulating of drilling fluids in a casing, respectively.
  • Casings that are used in e.g. oil industry show a variation in diameter and/or of their circular shape due to e.g. production tolerances.
  • To bring a sealing device into a casing requires a relatively large gap between the outside dimeter of the sealing device and the inside diameter of the casing in order to deal with the variations.
  • there is a variation of nominal diameters between different casings that may increase the opening or gap if these have to be sealed with the same sealing device.
  • This requires additional sealing measures, like an inflatable device, to seal such a gap. Due to the enormous pressure that may occur inside the casing, e.g. in a range of 200-1000 bar due to the e.g. gas pockets, these additional sealing measures may leak, damage etc..
  • the forces acting on an extendable sealing device may become large, thereby requiring large dimensions of such a sealing device.
  • the present invention has for its objects to provide a sealing device for sealing a casing and (partly) obviate at least some of the above problems.
  • the present invention provides a sealing device for sealing a casing comprising:
  • the sealing device is brought into the casing with the housing of such a sealing device having an outside diameter that, at the time of entering the sealing device into the casing, is smaller than the inside diameter of this casing.
  • a core is located that is provided with sliding surfaces.
  • At least two, but preferably four, sealing segments are in slidable engagement with this core and may slide over the sliding surfaces of the core.
  • the sealing segments slide over the sliding surfaces of the core. This sliding will change the outside diameter of the sealing device on at least one position of this sealing device. This is achieved by providing the sliding surfaces such that, when sliding the sealing segments in longitudinal direction of the sealing device, the sealing segments are directed radially from the core.
  • a further advantage of the invention is that it is easier to bring a sealing device into a casing, thereby minimizing the time required to achieve the sealing of a casing.
  • a further advantage of the invention is the obtaining of a larger flexibility for the range of nominal casing diameters that may be sealed with one specific sealing device. Furthermore, by reducing the number of parts and allowing a larger flexibility of diameters of the casings a more efficient operation may be achieved.
  • the sealing device comprises first actuating means for moving the sealing segments and the wedges relative to the core, and second actuating means for moving the wedges relative to the core and the sealing segments.
  • first actuating means move the sealing segments and the wedges relative to the core over the sliding surfaces to increase the outside diameter of the sealing device inside the casing.
  • second step the lack of material on the outside diameter of the sealing devices is compensated by moving the wedges relative to the sealing segments, thereby adding material on the outside diameter of the sealing device inside the casing. This will result in a more or less mechanical sealing of the casing by the sealing device.
  • sealing segments, wedges and core comprise a sealing strip.
  • the sealing device By providing a sealing strip on the outside of the sealing segments and the wedges the sealing device will seal over the entire inside perimeter of the casing, also in presence of all kinds of variations and tolerances.
  • the sealing strip is made of a poly-urethane material that is preferably located into recesses provided in the sealing segments and the wedges.
  • a sealing strip may extend about 1 mm outside the sealing segments and wedges.
  • the core may be provided with a notch over its outside diameter. This notch may be filled with a sealing ring.
  • a further advantage of these sealing strips is that the sealing device may cope with an even larger range of casing diameters, variances and tolerances.
  • the core of the sealing device comprises a supply channel.
  • the supply channel is used to provide a wellbore with a fluid. This will be relevant when running casing into a hole, as the casing is normally filled with fluid as new joints are added to the casing string to prevent the collapse of the casing during the run-in operation. Also, the fluid may be required to remove sand etc. from the casing.
  • the sealing device By combining the sealing device with the supply channel a more efficient operation may be achieved, also in case of a casing being stuck in the hole. This combination prevents the use of separate equipment to free a stuck casing.
  • a further advantage of such a combination is that by supplying the liquid, and at the same time sealing the casing, an increased pressure may be realised inside the casing.
  • the sealing device comprises a valve for closing the supply channel.
  • valve prevents fluids flowing from the casing into the supply channel.
  • the valve comprises guiding means to guide the sealing device into the casing. By designing the shape of the relevant parts of the valve this valve may act as guiding means thereby speeding up the sealing operation.
  • the valve of the sealing device comprises spring means. By adding spring means to the valve it is possible to incorporate a safety measure into the sealing device. This safety measure is actuated e.g. in case the pressure inside the supply channel increases. Thus, such a pressure increase will be limited, thereby preventing damage to the sealing device.
  • the supply channel is provided with an (threaded) insert on the exit of the supply channel that may be easily replaced.
  • this insert as the weakest part of the sealing device most of the damage will be accumulated in this insert. This will prevent damage to the other parts of the sealing device. As the insert is relatively easily removed and changed with an other insert damage and maintains costs will be reduced.
  • the sealing device comprises friction means to hold the sealing devices relative to the casing.
  • additional friction means in the form of claws and/or teeth will be provided.
  • the friction means only act on the surface of the casing if the sealing device actually seals the casing.
  • the invention further relates to a method for sealing a casing.
  • a conventional drilling rig 2 ( figure 1 ) comprises the sealing device 4.
  • the rig 2 comprises a lifting device or travelling block 6 capable of transferring the top drive 8.
  • an elevator 10 provided with hooks 12.
  • the elevator 10 supports in a conventional manner casing 14.
  • the elevator 10 is connected to lifting device 6 by links 16.
  • the sealing device 4 is connected with a liquid or mud supply 18 by connecting part 20 and hoses 22.
  • two hoses 22 are provided to have a stable orientation of the sealing device 4.
  • hoses 22 are provided with a sufficient length between connecting part 20 and entry part 24 to allow for a vertical displacement of the sealing device by hoist device 26.
  • Hoist device 26 is connected to the sealing device 4 by connection 28.
  • the sealing device 4 is provided with connections 30 for oil. Oil is supplied by hoses 32 from an oil supply and controller 34. These hoses 32 are also provided with a length sufficient for vertically displacing sealing device 4.
  • the sealing mechanism 36 ( figure 2 ) comprises a core 38 provided with a supply channel 40 for the supply of mud. Core 38 also comprises a notch or groove 39 for a sealing ring. Sealing mechanism 36 further comprises sealing segments 42 and wedges 44. A wedge 44 may slide over sliding surfaces 46 of core 38. Sealing segment 42 may slide over sliding surface 48 of core 38. Wedge 44 moves relative to the sealing segment 42 over side surface 50 of sealing segment 42. The sealing mechanism 36 may be located into casing 14 to seal this casing. The sliding surfaces 48 are put at an angle with the longitudinal direction of the sealing device 4 and, therefore, transfers the segments 42 radially when sliding over core 38.
  • the sealing device or fill-up tool 4 ( figures 3A-3D ) comprises a connecting part 28 that is connected to hoist device 26.
  • the sealing device 4 also comprises connection 20 for supply of liquid or mud.
  • Top lid 52 comprises connections 54 for oil supply. This oil may be brought into chamber 56 that is used to slide wedges 44 relative to sliding segments 42 and core 38. Chamber 56 is sealed with seals 58 and 60. To remove wedges 44 and sealing segments 42 from the sidewall to the casting, thereby removing the sealing of casing 14, chamber 62 is filled. Oil chamber 62 is sealed with seals 60 and 68. The wedges 44 are moved by wedge axes 64.
  • the bottom side of chamber 62 is formed by the stationary part 66.
  • the stationary part 66 is connected to the housing 70 through bolts or screws 72.
  • the sealing device 4 further comprises a tooth rack 86 and a spring 88.
  • each segment 42 comprises two tooth racks 86 and, correspondingly, two springs.
  • Wedge 44 comprises a sealing strip or friction part 90.
  • the sealing segments 42 comprise sealing strip 92.
  • the sealing strips 90 and 92 are preferably both from poly-urethane.
  • the strip 90 on wedge 44 extends in a longitudinal direction as the wedge 44 may move relative to sealing segment 42, while at the same time the sealing perimeter must be guaranteed.
  • the downward end or mud saver assembly 94 of the sealing device 4 comprises valve parts 96.
  • the sealing device 4 with core 38 is provided with a supply channel 98.
  • the supply channel 98 on end 94 is provided with a stop 100 that is connected to the cross-shaped part 104 with bold 102.
  • Part 104 is shaped like a cross due to the fact that the illustrated embodiment involves four sealing segments 42.
  • Valve parts 96 are connected to the sealing segments 42 by guide pen 106.
  • the end of the supply channel 98 comprises a bush 108.
  • Bush 108 accumulates most of the damages and wear of the sliding device 4.
  • the mud saver assembly 94 ( figure 4 ) is positioned at the end of core 38 and supply channel 98.
  • the assembly 94 comprises valve parts 96. In the illustrated embodiment there are four valve parts 96.
  • the sealing segments 42 are provided with recesses for sealing strips 92.
  • the assembly 94 further comprises the cross-shaped part 104 that is connected with stop 100 by bolt 102.
  • the stop 100 has sides that are preferably under an angel with the direction of the sealing device 4, thereby guiding the stop 100 into the supply channel 98.
  • Valve parts 96 are connected to core 38 by guiding pens 106 through an opening in valve part 96 and core 38.
  • Guiding pen 106 is on one end provided with thread 128 for connection to valve parts 96. The other end of guide pen 106 is put into the core 38. Valve part 96 is connected with sealing segment 42 by bolt 122 through opening 124 in valve part 96. Bushing 108 acts as an insert to the supply channel 96 of the sealing device 4. The outside surface of threaded bushing 108 enables an easy removal or change of insert 108 in the supply channel 96 of the sealing device 4. As wear and/or damage is accumulated in the bushing 108 maintenance and damage costs are limited.
  • the cross-shaped valve part 104 ( figures 5A and B ) comprises a slotted hole 115 for guiding pen 106, a central bore 116 for bold 102 connecting to the stop 100, a recess 118 for stop 100 and bore 120 to spring 114.
  • Each valve part 96 ( figures 6A and B ) comprises an opening 110 for guiding pen 106, and bores 124 for connecting the valve part 96 with a sealing segments 42.
  • sealing device 4 is illustrated for a conventional drilling rig 2, also other applications in sealing of e.g. casings, hoses, conduits etc. may be realised. Also, changing the number of segments 42 and wedges 44, depending on e.g. the diameter of the casing 14, will be possible.
  • the actuating means are illustrated as a hydraulic system, it may be possible to move the sealing segments 42 and wedges 44 relative to the core 38 and each other with e.g. an electronic device.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Pipe Accessories (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Sealing Devices (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Glass Compositions (AREA)
  • Cable Accessories (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (10)

  1. Dichtungsvorrichtung (4) zum Abdichten einer Verrohrung (14) mit:
    - einem Gehäuse mit einem Außendurchmesser;
    - einem Kern (38) innerhalb des Gehäuses;
    - mindestens zwei Dichtungssegmenten (42) in gleitfähigem Eingriff mit dem Kern zum Ändern des Außendurchmessers der Dichtungsvorrichtung auf mindestens einer Position der Dichtungsvorrichtung; und
    - mindestens zwei Keilen (44) in gleitfähigem Eingriff mit dem Kern und den Dichtungssegmenten zum Abdichten der Dichtungsvorrichtung gegen die Verrohrung,
    gekennzeichnet durch:
    - ein erstes Betätigungsmittel (74) zum Bewegen der Dichtungssegmente und der Keile relativ zu dem Kern; und
    - ein zweites Betätigungsmittel (56) zum Bewegen der Keile relativ zu dem Kern und den Dichtungssegmenten.
  2. Dichtungsvorrichtung nach Anspruch 1, bei der die Dichtungssegmente, die Keile und der Kern einen Dichtungsstreifen (92) aufweisen.
  3. Dichtungsvorrichtung nach Anspruch 1 oder 2, bei der der Kern einen Lieferkanal (40) aufweist.
  4. Dichtungsvorrichtung nach Anspruch 3, bei der die Dichtungsvorrichtung ein Ventil (96, 100) zum Schließen des Lieferkanales (40) aufweist.
  5. Dichtungsvorrichtung nach Anspruch 4, bei der das Ventil ein Führungsmittel (106) aufweist zum Führen der Dichtung in der Verrohrung.
  6. Dichtungsvorrichtung nach Anspruch 4 oder 5, bei der das Ventil ein Federmittel (114) aufweist.
  7. Dichtungsvorrichtung nach einem der Ansprüche 3 bis 6, bei der der Lieferkanal mit einem Einsatz (108) versehen ist.
  8. Dichtungsvorrichtung nach einem der Ansprüche 1 bis 7, bei der die Dichtungsvorrichtung ein Reibungsmittel (90, 92) aufweist zum Halten der Dichtungsvorrichtung relativ zu der Verrohrung.
  9. Verfahren zum Abdichten und Entfernen der Dichtung einer Verrohrung (14) mit den Schritten:
    - Eingeben einer Dichtungsvorrichtung (4) in die Verrohrung, wobei die Dichtungsvorrichtung aufweist:
    - ein Gehäuse mit einem Außendurchmesser;
    - einen Kern (38) innerhalb des Gehäuses;
    - mindestens zwei Dichtungssegmenten (42) in gleitfähigem Eingriff mit dem Kern zum Ändern des Durchmessers der Dichtungsvorrichtung; und
    - mindestens zwei Keile (44) in gleitfähigem Eingriff mit dem Kern und den Dichtungssegmenten zum Abdichten der Dichtungsvorrichtung gegen die Verrohrung;
    - gleitfähiges Bewegen der Dichtungssegmente und der Keile relativ zu dem Kern mit einem ersten Betätigungsmittel (74) zum Vergrößern des Außendurchmessers der Dichtungsvorrichtung;
    - gleitfähiges Bewegen der Keile (44) relativ zu den Dichtungssegmenten mit einem zweiten Betätigungsmittel (56) zum Abdichten der Dichtungsvorrichtung gegen die Verrohrung;
    - Zurückziehen der Dichtungssegmente und der Keile; und
    - Zurückziehen der Dichtungsvorrichtung von der Verrohrung.
  10. Verfahren nach Anspruch 9, weiter mit dem Schritt des Lieferns eines Fluids zu der Verrohrung durch einen Lieferkanal (40) in dem Kern der Dichtungsvorrichtung, wobei die Dichtungssegmente und die Keile in abdichtendem oder nicht abdichtendem Eingriff mit der Verrohrung stehen.
EP07747301A 2007-05-07 2007-05-07 Dichtungsvorrichtung und verfahren zur abdichtung einer verrohrung Active EP2156008B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL2007/000119 WO2008136655A1 (en) 2007-05-07 2007-05-07 Sealing device and method for sealing a casing

Publications (2)

Publication Number Publication Date
EP2156008A1 EP2156008A1 (de) 2010-02-24
EP2156008B1 true EP2156008B1 (de) 2011-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07747301A Active EP2156008B1 (de) 2007-05-07 2007-05-07 Dichtungsvorrichtung und verfahren zur abdichtung einer verrohrung

Country Status (8)

Country Link
US (1) US8857525B2 (de)
EP (1) EP2156008B1 (de)
AT (1) ATE503911T1 (de)
CA (1) CA2684855A1 (de)
DE (1) DE602007013625D1 (de)
DK (1) DK2156008T3 (de)
NO (1) NO338198B1 (de)
WO (1) WO2008136655A1 (de)

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US2603294A (en) * 1945-12-21 1952-07-15 Lane Welis Company Well packer
US2589506A (en) * 1947-04-15 1952-03-18 Halliburton Oil Well Cementing Drillable packer
US2647584A (en) * 1949-03-11 1953-08-04 Baker Oil Tools Inc Well packer and bridge plug for well bores
US2870794A (en) * 1954-06-10 1959-01-27 Ellis B Thaxton Pipe plugs
US3181614A (en) * 1960-06-20 1965-05-04 Cicero C Brown Well packers
US3229767A (en) * 1962-12-31 1966-01-18 Baker Oil Tools Inc Well packer
US3285343A (en) * 1964-03-11 1966-11-15 Schlumberger Well Surv Corp Permanently set bridge plug
US3623551A (en) * 1970-01-02 1971-11-30 Schlumberger Technology Corp Anchoring apparatus for a well packer
US3645334A (en) * 1970-04-07 1972-02-29 Schlumberger Technology Corp Well packer apparatus
US4457369A (en) 1980-12-17 1984-07-03 Otis Engineering Corporation Packer for high temperature high pressure wells
US4997042A (en) * 1990-01-03 1991-03-05 Jordan Ronald A Casing circulator and method
US5191939A (en) * 1990-01-03 1993-03-09 Tam International Casing circulator and method
US5014782A (en) * 1990-01-30 1991-05-14 Daspit Ronald Albert Venting packer
US5293905A (en) * 1992-08-21 1994-03-15 Jaromir Friedrich Pipeline plug
US5586601A (en) * 1995-04-28 1996-12-24 Camco International Inc. Mechanism for anchoring well tool
US5682952A (en) 1996-03-27 1997-11-04 Tam International Extendable casing circulator and method
US5735348A (en) 1996-10-04 1998-04-07 Frank's International, Inc. Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
US7096976B2 (en) * 1999-11-05 2006-08-29 Halliburton Energy Services, Inc. Drilling formation tester, apparatus and methods of testing and monitoring status of tester
US6394180B1 (en) * 2000-07-12 2002-05-28 Halliburton Energy Service,S Inc. Frac plug with caged ball
US6899183B2 (en) * 2001-05-18 2005-05-31 Smith International, Inc. Casing attachment method and apparatus
US6695050B2 (en) * 2002-06-10 2004-02-24 Halliburton Energy Services, Inc. Expandable retaining shoe
NO316740B1 (no) * 2002-06-26 2004-04-19 Plugging Specialists Int Anordning ved en plugg for tetting av vaeske- eller gassforende ror
US6832656B2 (en) * 2002-06-26 2004-12-21 Weartherford/Lamb, Inc. Valve for an internal fill up tool and associated method
US7171987B2 (en) * 2002-12-13 2007-02-06 Serret Raymond J Pipe fitting plug
ATE512280T1 (de) * 2004-03-19 2011-06-15 Tesco Corp Speerartiger bohrlochschieber
NO322727B1 (no) * 2005-03-21 2006-12-04 Tdw Offshore Services As Plugg med gripeanordning
US20070051521A1 (en) * 2005-09-08 2007-03-08 Eagle Downhole Solutions, Llc Retrievable frac packer

Also Published As

Publication number Publication date
DE602007013625D1 (de) 2011-05-12
ATE503911T1 (de) 2011-04-15
WO2008136655A1 (en) 2008-11-13
US8857525B2 (en) 2014-10-14
EP2156008A1 (de) 2010-02-24
NO20093282L (no) 2009-12-04
US20100206578A1 (en) 2010-08-19
DK2156008T3 (da) 2011-06-14
NO338198B1 (no) 2016-08-01
CA2684855A1 (en) 2008-11-13

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